2 numbers have a gcf of 3 = 3 & 6, 6 &9,...
The GCF for those three numbers is.... 1 !
6 and 9
6and 9
You need at least two numbers. 18 and 36 among others.
That depends on the numbers you're comparing. 6 is the GCF of 12 and 18. 9 is the GCF of 18 and 27.
Example: GCF of 6 and 12= 2 Example 2: GCF of 54 and 6=9 List all the factors of the numbers you use, then if the numbers you have when you list the factors have the same number in both sets of numbers, that is your GCF
6 and 9, among many others.
9
The Least Common Multiple (LCM) for 6 9 is 18.
6 and 12 have a GCF of 6.
The GCF is 9.